/******************************************************************************
* The MIT License
* Copyright (c) 2003 Novell Inc.  www.novell.com
* 
* Permission is hereby granted, free of charge, to any person obtaining  a copy
* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including  without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
* copies of the Software, and to  permit persons to whom the Software is 
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in 
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*******************************************************************************/
//
// Novell.Directory.Ldap.Asn1.Asn1OctetString.cs
//
// Author:
//   Sunil Kumar (Sunilk@novell.com)
//
// (C) 2003 Novell, Inc (http://www.novell.com)
//

using System;
using System.IO;
using System.Text;

namespace Novell.Directory.Ldap.Asn1
{
    /// <summary> This class encapsulates the OCTET STRING type.</summary>
    [CLSCompliant(true)]
    public class Asn1OctetString : Asn1Object
    {
        private readonly sbyte[] content;

        /// <summary> ASN.1 OCTET STRING tag definition.</summary>
        public const int TAG = 0x04;

        /// <summary>
        ///     ID is added for Optimization.
        ///     Id needs only be one Value for every instance,
        ///     thus we create it only once.
        /// </summary>
        protected internal static readonly Asn1Identifier ID = new Asn1Identifier(Asn1Identifier.UNIVERSAL, false, TAG);

        /* Constructors for Asn1OctetString
                */

        /// <summary>
        ///     Call this constructor to construct an Asn1OctetString
        ///     object from a byte array.
        /// </summary>
        /// <param name="content">
        ///     A byte array representing the string that
        ///     will be contained in the this Asn1OctetString object
        /// </param>
        [CLSCompliant(false)]
        public Asn1OctetString(sbyte[] content) : base(ID)
        {
            this.content = content;
        }


        /// <summary>
        ///     Call this constructor to construct an Asn1OctetString
        ///     object from a String object.
        /// </summary>
        /// <param name="content">
        ///     A string value that will be contained
        ///     in the this Asn1OctetString object
        /// </param>
        public Asn1OctetString(string content) : base(ID)
        {
            try
            {
/*                System.Text.UTF8Encoding utf8 = new System.Text.UTF8Encoding();
				byte[] bytes = utf8.GetBytes (content);
				sbyte[] sbytes = new sbyte[bytes.Length+1]; //signed bytes
				sbytes[0] = 0; //set sign byte to zero.
				for(int i=1; i<sbytes.Length; i++)
					sbytes[i] = (sbyte) bytes[i-1]; //cast byte-->sbyte
*/
                var encoder = Encoding.GetEncoding("utf-8");
                var ibytes = encoder.GetBytes(content);
                var sbytes = SupportClass.ToSByteArray(ibytes);

                this.content = sbytes;
//				this.content = content.getBytes("UTF8");
            }
            catch (IOException uee)
            {
                throw new Exception(uee.ToString());
            }
        }


        /// <summary>
        ///     Constructs an Asn1OctetString object by decoding data from an
        ///     input stream.
        /// </summary>
        /// <param name="dec">
        ///     The decoder object to use when decoding the
        ///     input stream.  Sometimes a developer might want to pass
        ///     in his/her own decoder object
        /// </param>
        /// <param name="in">
        ///     A byte stream that contains the encoded ASN.1
        /// </param>
        [CLSCompliant(false)]
        public Asn1OctetString(Asn1Decoder dec, Stream in_Renamed, int len) : base(ID)
        {
            content = len > 0 ? (sbyte[]) dec.decodeOctetString(in_Renamed, len) : new sbyte[0];
        }


        /* Asn1Object implementation
        */

        /// <summary>
        ///     Call this method to encode the current instance into the
        ///     specified output stream using the specified encoder object.
        /// </summary>
        /// <param name="enc">
        ///     Encoder object to use when encoding self.
        /// </param>
        /// <param name="out">
        ///     The output stream onto which the encoded byte
        ///     stream is written.
        /// </param>
        public override void encode(Asn1Encoder enc, Stream out_Renamed)
        {
            enc.encode(this, out_Renamed);
        }


        /*Asn1OctetString specific methods
        */

        /// <summary> Returns the content of this Asn1OctetString as a byte array.</summary>
        [CLSCompliant(false)]
        public sbyte[] byteValue()
        {
            return content;
        }


        /// <summary> Returns the content of this Asn1OctetString as a String.</summary>
        public string stringValue()
        {
            string s = null;
            try
            {
                var encoder = Encoding.GetEncoding("utf-8");
                var dchar = encoder.GetChars(SupportClass.ToByteArray(content));
                s = new string(dchar);
//				sbyte *sb=content;
//				s = new  String(sb,0,content.Length, new System.Text.UTF8Encoding());
            }
            catch (IOException uee)
            {
                throw new Exception(uee.ToString());
            }

            return s;
        }


        /// <summary> Return a String representation of this Asn1Object.</summary>
        public override string ToString()
        {
            return base.ToString() + "OCTET STRING: " + stringValue();
        }
    }
}